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Gnu.cpp
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Gnu.cpp
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//===--- Gnu.cpp - Gnu Tool and ToolChain Implementations -------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "Gnu.h"
#include "Arch/ARM.h"
#include "Arch/CSKY.h"
#include "Arch/Mips.h"
#include "Arch/PPC.h"
#include "Arch/RISCV.h"
#include "Arch/Sparc.h"
#include "Arch/SystemZ.h"
#include "CommonArgs.h"
#include "Linux.h"
#include "clang/Config/config.h" // for GCC_INSTALL_PREFIX
#include "clang/Driver/Compilation.h"
#include "clang/Driver/Driver.h"
#include "clang/Driver/DriverDiagnostic.h"
#include "clang/Driver/Options.h"
#include "clang/Driver/Tool.h"
#include "clang/Driver/ToolChain.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Support/CodeGen.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/TargetParser.h"
#include "llvm/Support/VirtualFileSystem.h"
#include <system_error>
using namespace clang::driver;
using namespace clang::driver::toolchains;
using namespace clang;
using namespace llvm::opt;
using tools::addMultilibFlag;
using tools::addPathIfExists;
static bool forwardToGCC(const Option &O) {
// LinkerInput options have been forwarded. Don't duplicate.
if (O.hasFlag(options::LinkerInput))
return false;
return O.matches(options::OPT_Link_Group) || O.hasFlag(options::LinkOption);
}
// Switch CPU names not recognized by GNU assembler to a close CPU that it does
// recognize, instead of a lower march from being picked in the absence of a cpu
// flag.
static void normalizeCPUNamesForAssembler(const ArgList &Args,
ArgStringList &CmdArgs) {
if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
StringRef CPUArg(A->getValue());
if (CPUArg.equals_insensitive("krait"))
CmdArgs.push_back("-mcpu=cortex-a15");
else if (CPUArg.equals_insensitive("kryo"))
CmdArgs.push_back("-mcpu=cortex-a57");
else
Args.AddLastArg(CmdArgs, options::OPT_mcpu_EQ);
}
}
void tools::gcc::Common::ConstructJob(Compilation &C, const JobAction &JA,
const InputInfo &Output,
const InputInfoList &Inputs,
const ArgList &Args,
const char *LinkingOutput) const {
const Driver &D = getToolChain().getDriver();
ArgStringList CmdArgs;
for (const auto &A : Args) {
if (forwardToGCC(A->getOption())) {
// It is unfortunate that we have to claim here, as this means
// we will basically never report anything interesting for
// platforms using a generic gcc, even if we are just using gcc
// to get to the assembler.
A->claim();
A->render(Args, CmdArgs);
}
}
RenderExtraToolArgs(JA, CmdArgs);
// If using a driver, force the arch.
if (getToolChain().getTriple().isOSDarwin()) {
CmdArgs.push_back("-arch");
CmdArgs.push_back(
Args.MakeArgString(getToolChain().getDefaultUniversalArchName()));
}
// Try to force gcc to match the tool chain we want, if we recognize
// the arch.
//
// FIXME: The triple class should directly provide the information we want
// here.
switch (getToolChain().getArch()) {
default:
break;
case llvm::Triple::x86:
case llvm::Triple::ppc:
case llvm::Triple::ppcle:
CmdArgs.push_back("-m32");
break;
case llvm::Triple::x86_64:
case llvm::Triple::ppc64:
case llvm::Triple::ppc64le:
CmdArgs.push_back("-m64");
break;
case llvm::Triple::sparcel:
CmdArgs.push_back("-EL");
break;
}
if (Output.isFilename()) {
CmdArgs.push_back("-o");
CmdArgs.push_back(Output.getFilename());
} else {
assert(Output.isNothing() && "Unexpected output");
CmdArgs.push_back("-fsyntax-only");
}
Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
// Only pass -x if gcc will understand it; otherwise hope gcc
// understands the suffix correctly. The main use case this would go
// wrong in is for linker inputs if they happened to have an odd
// suffix; really the only way to get this to happen is a command
// like '-x foobar a.c' which will treat a.c like a linker input.
//
// FIXME: For the linker case specifically, can we safely convert
// inputs into '-Wl,' options?
for (const auto &II : Inputs) {
// Don't try to pass LLVM or AST inputs to a generic gcc.
if (types::isLLVMIR(II.getType()))
D.Diag(clang::diag::err_drv_no_linker_llvm_support)
<< getToolChain().getTripleString();
else if (II.getType() == types::TY_AST)
D.Diag(diag::err_drv_no_ast_support) << getToolChain().getTripleString();
else if (II.getType() == types::TY_ModuleFile)
D.Diag(diag::err_drv_no_module_support)
<< getToolChain().getTripleString();
if (types::canTypeBeUserSpecified(II.getType())) {
CmdArgs.push_back("-x");
CmdArgs.push_back(types::getTypeName(II.getType()));
}
if (II.isFilename())
CmdArgs.push_back(II.getFilename());
else {
const Arg &A = II.getInputArg();
// Reverse translate some rewritten options.
if (A.getOption().matches(options::OPT_Z_reserved_lib_stdcxx)) {
CmdArgs.push_back("-lstdc++");
continue;
}
// Don't render as input, we need gcc to do the translations.
A.render(Args, CmdArgs);
}
}
const std::string &customGCCName = D.getCCCGenericGCCName();
const char *GCCName;
if (!customGCCName.empty())
GCCName = customGCCName.c_str();
else if (D.CCCIsCXX()) {
GCCName = "g++";
} else
GCCName = "gcc";
const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath(GCCName));
C.addCommand(std::make_unique<Command>(JA, *this,
ResponseFileSupport::AtFileCurCP(),
Exec, CmdArgs, Inputs, Output));
}
void tools::gcc::Preprocessor::RenderExtraToolArgs(
const JobAction &JA, ArgStringList &CmdArgs) const {
CmdArgs.push_back("-E");
}
void tools::gcc::Compiler::RenderExtraToolArgs(const JobAction &JA,
ArgStringList &CmdArgs) const {
const Driver &D = getToolChain().getDriver();
switch (JA.getType()) {
// If -flto, etc. are present then make sure not to force assembly output.
case types::TY_LLVM_IR:
case types::TY_LTO_IR:
case types::TY_LLVM_BC:
case types::TY_LTO_BC:
CmdArgs.push_back("-c");
break;
// We assume we've got an "integrated" assembler in that gcc will produce an
// object file itself.
case types::TY_Object:
CmdArgs.push_back("-c");
break;
case types::TY_PP_Asm:
CmdArgs.push_back("-S");
break;
case types::TY_Nothing:
CmdArgs.push_back("-fsyntax-only");
break;
default:
D.Diag(diag::err_drv_invalid_gcc_output_type) << getTypeName(JA.getType());
}
}
void tools::gcc::Linker::RenderExtraToolArgs(const JobAction &JA,
ArgStringList &CmdArgs) const {
// The types are (hopefully) good enough.
}
// On Arm the endianness of the output file is determined by the target and
// can be overridden by the pseudo-target flags '-mlittle-endian'/'-EL' and
// '-mbig-endian'/'-EB'. Unlike other targets the flag does not result in a
// normalized triple so we must handle the flag here.
static bool isArmBigEndian(const llvm::Triple &Triple,
const ArgList &Args) {
bool IsBigEndian = false;
switch (Triple.getArch()) {
case llvm::Triple::armeb:
case llvm::Triple::thumbeb:
IsBigEndian = true;
[[fallthrough]];
case llvm::Triple::arm:
case llvm::Triple::thumb:
if (Arg *A = Args.getLastArg(options::OPT_mlittle_endian,
options::OPT_mbig_endian))
IsBigEndian = !A->getOption().matches(options::OPT_mlittle_endian);
break;
default:
break;
}
return IsBigEndian;
}
static const char *getLDMOption(const llvm::Triple &T, const ArgList &Args) {
switch (T.getArch()) {
case llvm::Triple::x86:
if (T.isOSIAMCU())
return "elf_iamcu";
return "elf_i386";
case llvm::Triple::aarch64:
return "aarch64linux";
case llvm::Triple::aarch64_be:
return "aarch64linuxb";
case llvm::Triple::arm:
case llvm::Triple::thumb:
case llvm::Triple::armeb:
case llvm::Triple::thumbeb:
return isArmBigEndian(T, Args) ? "armelfb_linux_eabi" : "armelf_linux_eabi";
case llvm::Triple::m68k:
return "m68kelf";
case llvm::Triple::ppc:
if (T.isOSLinux())
return "elf32ppclinux";
return "elf32ppc";
case llvm::Triple::ppcle:
if (T.isOSLinux())
return "elf32lppclinux";
return "elf32lppc";
case llvm::Triple::ppc64:
return "elf64ppc";
case llvm::Triple::ppc64le:
return "elf64lppc";
case llvm::Triple::riscv32:
return "elf32lriscv";
case llvm::Triple::riscv64:
return "elf64lriscv";
case llvm::Triple::sparc:
case llvm::Triple::sparcel:
return "elf32_sparc";
case llvm::Triple::sparcv9:
return "elf64_sparc";
case llvm::Triple::loongarch32:
return "elf32loongarch";
case llvm::Triple::loongarch64:
return "elf64loongarch";
case llvm::Triple::mips:
return "elf32btsmip";
case llvm::Triple::mipsel:
return "elf32ltsmip";
case llvm::Triple::mips64:
if (tools::mips::hasMipsAbiArg(Args, "n32") ||
T.getEnvironment() == llvm::Triple::GNUABIN32)
return "elf32btsmipn32";
return "elf64btsmip";
case llvm::Triple::mips64el:
if (tools::mips::hasMipsAbiArg(Args, "n32") ||
T.getEnvironment() == llvm::Triple::GNUABIN32)
return "elf32ltsmipn32";
return "elf64ltsmip";
case llvm::Triple::systemz:
return "elf64_s390";
case llvm::Triple::x86_64:
if (T.isX32())
return "elf32_x86_64";
return "elf_x86_64";
case llvm::Triple::ve:
return "elf64ve";
case llvm::Triple::csky:
return "cskyelf_linux";
default:
return nullptr;
}
}
static bool getPIE(const ArgList &Args, const ToolChain &TC) {
if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_static) ||
Args.hasArg(options::OPT_r) || Args.hasArg(options::OPT_static_pie))
return false;
Arg *A = Args.getLastArg(options::OPT_pie, options::OPT_no_pie,
options::OPT_nopie);
if (!A)
return TC.isPIEDefault(Args);
return A->getOption().matches(options::OPT_pie);
}
static bool getStaticPIE(const ArgList &Args, const ToolChain &TC) {
bool HasStaticPIE = Args.hasArg(options::OPT_static_pie);
// -no-pie is an alias for -nopie. So, handling -nopie takes care of
// -no-pie as well.
if (HasStaticPIE && Args.hasArg(options::OPT_nopie)) {
const Driver &D = TC.getDriver();
const llvm::opt::OptTable &Opts = D.getOpts();
StringRef StaticPIEName = Opts.getOptionName(options::OPT_static_pie);
StringRef NoPIEName = Opts.getOptionName(options::OPT_nopie);
D.Diag(diag::err_drv_cannot_mix_options) << StaticPIEName << NoPIEName;
}
return HasStaticPIE;
}
static bool getStatic(const ArgList &Args) {
return Args.hasArg(options::OPT_static) &&
!Args.hasArg(options::OPT_static_pie);
}
void tools::gnutools::StaticLibTool::ConstructJob(
Compilation &C, const JobAction &JA, const InputInfo &Output,
const InputInfoList &Inputs, const ArgList &Args,
const char *LinkingOutput) const {
const Driver &D = getToolChain().getDriver();
// Silence warning for "clang -g foo.o -o foo"
Args.ClaimAllArgs(options::OPT_g_Group);
// and "clang -emit-llvm foo.o -o foo"
Args.ClaimAllArgs(options::OPT_emit_llvm);
// and for "clang -w foo.o -o foo". Other warning options are already
// handled somewhere else.
Args.ClaimAllArgs(options::OPT_w);
// Silence warnings when linking C code with a C++ '-stdlib' argument.
Args.ClaimAllArgs(options::OPT_stdlib_EQ);
// ar tool command "llvm-ar <options> <output_file> <input_files>".
ArgStringList CmdArgs;
// Create and insert file members with a deterministic index.
CmdArgs.push_back("rcsD");
CmdArgs.push_back(Output.getFilename());
for (const auto &II : Inputs) {
if (II.isFilename()) {
CmdArgs.push_back(II.getFilename());
}
}
// Delete old output archive file if it already exists before generating a new
// archive file.
auto OutputFileName = Output.getFilename();
if (Output.isFilename() && llvm::sys::fs::exists(OutputFileName)) {
if (std::error_code EC = llvm::sys::fs::remove(OutputFileName)) {
D.Diag(diag::err_drv_unable_to_remove_file) << EC.message();
return;
}
}
const char *Exec = Args.MakeArgString(getToolChain().GetStaticLibToolPath());
C.addCommand(std::make_unique<Command>(JA, *this,
ResponseFileSupport::AtFileCurCP(),
Exec, CmdArgs, Inputs, Output));
}
void tools::gnutools::Linker::ConstructJob(Compilation &C, const JobAction &JA,
const InputInfo &Output,
const InputInfoList &Inputs,
const ArgList &Args,
const char *LinkingOutput) const {
// FIXME: The Linker class constructor takes a ToolChain and not a
// Generic_ELF, so the static_cast might return a reference to a invalid
// instance (see PR45061). Ideally, the Linker constructor needs to take a
// Generic_ELF instead.
const toolchains::Generic_ELF &ToolChain =
static_cast<const toolchains::Generic_ELF &>(getToolChain());
const Driver &D = ToolChain.getDriver();
const llvm::Triple &Triple = getToolChain().getEffectiveTriple();
const llvm::Triple::ArchType Arch = ToolChain.getArch();
const bool isAndroid = ToolChain.getTriple().isAndroid();
const bool IsIAMCU = ToolChain.getTriple().isOSIAMCU();
const bool IsVE = ToolChain.getTriple().isVE();
const bool IsPIE = getPIE(Args, ToolChain);
const bool IsStaticPIE = getStaticPIE(Args, ToolChain);
const bool IsStatic = getStatic(Args);
const bool HasCRTBeginEndFiles =
ToolChain.getTriple().hasEnvironment() ||
(ToolChain.getTriple().getVendor() != llvm::Triple::MipsTechnologies);
ArgStringList CmdArgs;
// Silence warning for "clang -g foo.o -o foo"
Args.ClaimAllArgs(options::OPT_g_Group);
// and "clang -emit-llvm foo.o -o foo"
Args.ClaimAllArgs(options::OPT_emit_llvm);
// and for "clang -w foo.o -o foo". Other warning options are already
// handled somewhere else.
Args.ClaimAllArgs(options::OPT_w);
if (!D.SysRoot.empty())
CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
if (IsPIE)
CmdArgs.push_back("-pie");
if (IsStaticPIE) {
CmdArgs.push_back("-static");
CmdArgs.push_back("-pie");
CmdArgs.push_back("--no-dynamic-linker");
CmdArgs.push_back("-z");
CmdArgs.push_back("text");
}
if (Args.hasArg(options::OPT_rdynamic))
CmdArgs.push_back("-export-dynamic");
if (Args.hasArg(options::OPT_s))
CmdArgs.push_back("-s");
if (Triple.isARM() || Triple.isThumb() || Triple.isAArch64()) {
bool IsBigEndian = isArmBigEndian(Triple, Args);
if (IsBigEndian)
arm::appendBE8LinkFlag(Args, CmdArgs, Triple);
IsBigEndian = IsBigEndian || Arch == llvm::Triple::aarch64_be;
CmdArgs.push_back(IsBigEndian ? "-EB" : "-EL");
}
// Most Android ARM64 targets should enable the linker fix for erratum
// 843419. Only non-Cortex-A53 devices are allowed to skip this flag.
if (Arch == llvm::Triple::aarch64 && isAndroid) {
std::string CPU = getCPUName(D, Args, Triple);
if (CPU.empty() || CPU == "generic" || CPU == "cortex-a53")
CmdArgs.push_back("--fix-cortex-a53-843419");
}
ToolChain.addExtraOpts(CmdArgs);
CmdArgs.push_back("--eh-frame-hdr");
if (const char *LDMOption = getLDMOption(ToolChain.getTriple(), Args)) {
CmdArgs.push_back("-m");
CmdArgs.push_back(LDMOption);
} else {
D.Diag(diag::err_target_unknown_triple) << Triple.str();
return;
}
if (Triple.isRISCV())
CmdArgs.push_back("-X");
if (Args.hasArg(options::OPT_shared))
CmdArgs.push_back("-shared");
if (IsStatic) {
CmdArgs.push_back("-static");
} else {
if (Args.hasArg(options::OPT_rdynamic))
CmdArgs.push_back("-export-dynamic");
if (!Args.hasArg(options::OPT_shared) && !IsStaticPIE &&
!Args.hasArg(options::OPT_r)) {
CmdArgs.push_back("-dynamic-linker");
CmdArgs.push_back(Args.MakeArgString(Twine(D.DyldPrefix) +
ToolChain.getDynamicLinker(Args)));
}
}
CmdArgs.push_back("-o");
CmdArgs.push_back(Output.getFilename());
if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles,
options::OPT_r)) {
if (!isAndroid && !IsIAMCU) {
const char *crt1 = nullptr;
if (!Args.hasArg(options::OPT_shared)) {
if (Args.hasArg(options::OPT_pg))
crt1 = "gcrt1.o";
else if (IsPIE)
crt1 = "Scrt1.o";
else if (IsStaticPIE)
crt1 = "rcrt1.o";
else
crt1 = "crt1.o";
}
if (crt1)
CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crt1)));
CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crti.o")));
}
if (IsVE) {
CmdArgs.push_back("-z");
CmdArgs.push_back("max-page-size=0x4000000");
}
if (IsIAMCU)
CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crt0.o")));
else if (HasCRTBeginEndFiles) {
std::string P;
if (ToolChain.GetRuntimeLibType(Args) == ToolChain::RLT_CompilerRT &&
!isAndroid) {
std::string crtbegin = ToolChain.getCompilerRT(Args, "crtbegin",
ToolChain::FT_Object);
if (ToolChain.getVFS().exists(crtbegin))
P = crtbegin;
}
if (P.empty()) {
const char *crtbegin;
if (Args.hasArg(options::OPT_shared))
crtbegin = isAndroid ? "crtbegin_so.o" : "crtbeginS.o";
else if (IsStatic)
crtbegin = isAndroid ? "crtbegin_static.o" : "crtbeginT.o";
else if (IsPIE || IsStaticPIE)
crtbegin = isAndroid ? "crtbegin_dynamic.o" : "crtbeginS.o";
else
crtbegin = isAndroid ? "crtbegin_dynamic.o" : "crtbegin.o";
P = ToolChain.GetFilePath(crtbegin);
}
CmdArgs.push_back(Args.MakeArgString(P));
}
// Add crtfastmath.o if available and fast math is enabled.
ToolChain.addFastMathRuntimeIfAvailable(Args, CmdArgs);
}
Args.AddAllArgs(CmdArgs, options::OPT_L);
Args.AddAllArgs(CmdArgs, options::OPT_u);
ToolChain.AddFilePathLibArgs(Args, CmdArgs);
if (D.isUsingLTO()) {
assert(!Inputs.empty() && "Must have at least one input.");
addLTOOptions(ToolChain, Args, CmdArgs, Output, Inputs[0],
D.getLTOMode() == LTOK_Thin);
}
if (Args.hasArg(options::OPT_Z_Xlinker__no_demangle))
CmdArgs.push_back("--no-demangle");
bool NeedsSanitizerDeps = addSanitizerRuntimes(ToolChain, Args, CmdArgs);
bool NeedsXRayDeps = addXRayRuntime(ToolChain, Args, CmdArgs);
addLinkerCompressDebugSectionsOption(ToolChain, Args, CmdArgs);
AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
addHIPRuntimeLibArgs(ToolChain, Args, CmdArgs);
// The profile runtime also needs access to system libraries.
getToolChain().addProfileRTLibs(Args, CmdArgs);
if (D.CCCIsCXX() &&
!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs,
options::OPT_r)) {
if (ToolChain.ShouldLinkCXXStdlib(Args)) {
bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) &&
!Args.hasArg(options::OPT_static);
if (OnlyLibstdcxxStatic)
CmdArgs.push_back("-Bstatic");
ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
if (OnlyLibstdcxxStatic)
CmdArgs.push_back("-Bdynamic");
}
CmdArgs.push_back("-lm");
}
// Silence warnings when linking C code with a C++ '-stdlib' argument.
Args.ClaimAllArgs(options::OPT_stdlib_EQ);
// Additional linker set-up and flags for Fortran. This is required in order
// to generate executables. As Fortran runtime depends on the C runtime,
// these dependencies need to be listed before the C runtime below (i.e.
// AddRuntTimeLibs).
if (D.IsFlangMode()) {
addFortranRuntimeLibraryPath(ToolChain, Args, CmdArgs);
addFortranRuntimeLibs(ToolChain, CmdArgs);
CmdArgs.push_back("-lm");
}
if (!Args.hasArg(options::OPT_nostdlib, options::OPT_r)) {
if (!Args.hasArg(options::OPT_nodefaultlibs)) {
if (IsStatic || IsStaticPIE)
CmdArgs.push_back("--start-group");
if (NeedsSanitizerDeps)
linkSanitizerRuntimeDeps(ToolChain, CmdArgs);
if (NeedsXRayDeps)
linkXRayRuntimeDeps(ToolChain, CmdArgs);
bool WantPthread = Args.hasArg(options::OPT_pthread) ||
Args.hasArg(options::OPT_pthreads);
// Use the static OpenMP runtime with -static-openmp
bool StaticOpenMP = Args.hasArg(options::OPT_static_openmp) &&
!Args.hasArg(options::OPT_static);
// FIXME: Only pass GompNeedsRT = true for platforms with libgomp that
// require librt. Most modern Linux platforms do, but some may not.
if (addOpenMPRuntime(CmdArgs, ToolChain, Args, StaticOpenMP,
JA.isHostOffloading(Action::OFK_OpenMP),
/* GompNeedsRT= */ true))
// OpenMP runtimes implies pthreads when using the GNU toolchain.
// FIXME: Does this really make sense for all GNU toolchains?
WantPthread = true;
AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
// LLVM support for atomics on 32-bit SPARC V8+ is incomplete, so
// forcibly link with libatomic as a workaround.
// TODO: Issue #41880 and D118021.
if (getToolChain().getTriple().getArch() == llvm::Triple::sparc) {
CmdArgs.push_back("--push-state");
CmdArgs.push_back("--as-needed");
CmdArgs.push_back("-latomic");
CmdArgs.push_back("--pop-state");
}
if (WantPthread && !isAndroid)
CmdArgs.push_back("-lpthread");
if (Args.hasArg(options::OPT_fsplit_stack))
CmdArgs.push_back("--wrap=pthread_create");
if (!Args.hasArg(options::OPT_nolibc))
CmdArgs.push_back("-lc");
// Add IAMCU specific libs, if needed.
if (IsIAMCU)
CmdArgs.push_back("-lgloss");
if (IsStatic || IsStaticPIE)
CmdArgs.push_back("--end-group");
else
AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
// Add IAMCU specific libs (outside the group), if needed.
if (IsIAMCU) {
CmdArgs.push_back("--as-needed");
CmdArgs.push_back("-lsoftfp");
CmdArgs.push_back("--no-as-needed");
}
}
if (!Args.hasArg(options::OPT_nostartfiles) && !IsIAMCU) {
if (HasCRTBeginEndFiles) {
std::string P;
if (ToolChain.GetRuntimeLibType(Args) == ToolChain::RLT_CompilerRT &&
!isAndroid) {
std::string crtend = ToolChain.getCompilerRT(Args, "crtend",
ToolChain::FT_Object);
if (ToolChain.getVFS().exists(crtend))
P = crtend;
}
if (P.empty()) {
const char *crtend;
if (Args.hasArg(options::OPT_shared))
crtend = isAndroid ? "crtend_so.o" : "crtendS.o";
else if (IsPIE || IsStaticPIE)
crtend = isAndroid ? "crtend_android.o" : "crtendS.o";
else
crtend = isAndroid ? "crtend_android.o" : "crtend.o";
P = ToolChain.GetFilePath(crtend);
}
CmdArgs.push_back(Args.MakeArgString(P));
}
if (!isAndroid)
CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtn.o")));
}
}
Args.AddAllArgs(CmdArgs, options::OPT_T);
const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
C.addCommand(std::make_unique<Command>(JA, *this,
ResponseFileSupport::AtFileCurCP(),
Exec, CmdArgs, Inputs, Output));
}
void tools::gnutools::Assembler::ConstructJob(Compilation &C,
const JobAction &JA,
const InputInfo &Output,
const InputInfoList &Inputs,
const ArgList &Args,
const char *LinkingOutput) const {
const auto &D = getToolChain().getDriver();
claimNoWarnArgs(Args);
ArgStringList CmdArgs;
llvm::Reloc::Model RelocationModel;
unsigned PICLevel;
bool IsPIE;
const char *DefaultAssembler = "as";
std::tie(RelocationModel, PICLevel, IsPIE) =
ParsePICArgs(getToolChain(), Args);
if (const Arg *A = Args.getLastArg(options::OPT_gz, options::OPT_gz_EQ)) {
if (A->getOption().getID() == options::OPT_gz) {
CmdArgs.push_back("--compress-debug-sections");
} else {
StringRef Value = A->getValue();
if (Value == "none" || Value == "zlib" || Value == "zstd") {
CmdArgs.push_back(
Args.MakeArgString("--compress-debug-sections=" + Twine(Value)));
} else {
D.Diag(diag::err_drv_unsupported_option_argument)
<< A->getSpelling() << Value;
}
}
}
switch (getToolChain().getArch()) {
default:
break;
// Add --32/--64 to make sure we get the format we want.
// This is incomplete
case llvm::Triple::x86:
CmdArgs.push_back("--32");
break;
case llvm::Triple::x86_64:
if (getToolChain().getTriple().isX32())
CmdArgs.push_back("--x32");
else
CmdArgs.push_back("--64");
break;
case llvm::Triple::ppc: {
CmdArgs.push_back("-a32");
CmdArgs.push_back("-mppc");
CmdArgs.push_back("-mbig-endian");
CmdArgs.push_back(ppc::getPPCAsmModeForCPU(
getCPUName(D, Args, getToolChain().getTriple())));
break;
}
case llvm::Triple::ppcle: {
CmdArgs.push_back("-a32");
CmdArgs.push_back("-mppc");
CmdArgs.push_back("-mlittle-endian");
CmdArgs.push_back(ppc::getPPCAsmModeForCPU(
getCPUName(D, Args, getToolChain().getTriple())));
break;
}
case llvm::Triple::ppc64: {
CmdArgs.push_back("-a64");
CmdArgs.push_back("-mppc64");
CmdArgs.push_back("-mbig-endian");
CmdArgs.push_back(ppc::getPPCAsmModeForCPU(
getCPUName(D, Args, getToolChain().getTriple())));
break;
}
case llvm::Triple::ppc64le: {
CmdArgs.push_back("-a64");
CmdArgs.push_back("-mppc64");
CmdArgs.push_back("-mlittle-endian");
CmdArgs.push_back(ppc::getPPCAsmModeForCPU(
getCPUName(D, Args, getToolChain().getTriple())));
break;
}
case llvm::Triple::riscv32:
case llvm::Triple::riscv64: {
StringRef ABIName = riscv::getRISCVABI(Args, getToolChain().getTriple());
CmdArgs.push_back("-mabi");
CmdArgs.push_back(ABIName.data());
StringRef MArchName = riscv::getRISCVArch(Args, getToolChain().getTriple());
CmdArgs.push_back("-march");
CmdArgs.push_back(MArchName.data());
if (!Args.hasFlag(options::OPT_mrelax, options::OPT_mno_relax, true))
Args.addOptOutFlag(CmdArgs, options::OPT_mrelax, options::OPT_mno_relax);
break;
}
case llvm::Triple::sparc:
case llvm::Triple::sparcel: {
CmdArgs.push_back("-32");
std::string CPU = getCPUName(D, Args, getToolChain().getTriple());
CmdArgs.push_back(
sparc::getSparcAsmModeForCPU(CPU, getToolChain().getTriple()));
AddAssemblerKPIC(getToolChain(), Args, CmdArgs);
break;
}
case llvm::Triple::sparcv9: {
CmdArgs.push_back("-64");
std::string CPU = getCPUName(D, Args, getToolChain().getTriple());
CmdArgs.push_back(
sparc::getSparcAsmModeForCPU(CPU, getToolChain().getTriple()));
AddAssemblerKPIC(getToolChain(), Args, CmdArgs);
break;
}
case llvm::Triple::arm:
case llvm::Triple::armeb:
case llvm::Triple::thumb:
case llvm::Triple::thumbeb: {
const llvm::Triple &Triple2 = getToolChain().getTriple();
CmdArgs.push_back(isArmBigEndian(Triple2, Args) ? "-EB" : "-EL");
switch (Triple2.getSubArch()) {
case llvm::Triple::ARMSubArch_v7:
CmdArgs.push_back("-mfpu=neon");
break;
case llvm::Triple::ARMSubArch_v8:
CmdArgs.push_back("-mfpu=crypto-neon-fp-armv8");
break;
default:
break;
}
switch (arm::getARMFloatABI(getToolChain(), Args)) {
case arm::FloatABI::Invalid: llvm_unreachable("must have an ABI!");
case arm::FloatABI::Soft:
CmdArgs.push_back(Args.MakeArgString("-mfloat-abi=soft"));
break;
case arm::FloatABI::SoftFP:
CmdArgs.push_back(Args.MakeArgString("-mfloat-abi=softfp"));
break;
case arm::FloatABI::Hard:
CmdArgs.push_back(Args.MakeArgString("-mfloat-abi=hard"));
break;
}
Args.AddLastArg(CmdArgs, options::OPT_march_EQ);
normalizeCPUNamesForAssembler(Args, CmdArgs);
Args.AddLastArg(CmdArgs, options::OPT_mfpu_EQ);
break;
}
case llvm::Triple::aarch64:
case llvm::Triple::aarch64_be: {
CmdArgs.push_back(
getToolChain().getArch() == llvm::Triple::aarch64_be ? "-EB" : "-EL");
Args.AddLastArg(CmdArgs, options::OPT_march_EQ);
normalizeCPUNamesForAssembler(Args, CmdArgs);
break;
}
case llvm::Triple::mips:
case llvm::Triple::mipsel:
case llvm::Triple::mips64:
case llvm::Triple::mips64el: {
StringRef CPUName;
StringRef ABIName;
mips::getMipsCPUAndABI(Args, getToolChain().getTriple(), CPUName, ABIName);
ABIName = mips::getGnuCompatibleMipsABIName(ABIName);
CmdArgs.push_back("-march");
CmdArgs.push_back(CPUName.data());
CmdArgs.push_back("-mabi");
CmdArgs.push_back(ABIName.data());
// -mno-shared should be emitted unless -fpic, -fpie, -fPIC, -fPIE,
// or -mshared (not implemented) is in effect.
if (RelocationModel == llvm::Reloc::Static)
CmdArgs.push_back("-mno-shared");
// LLVM doesn't support -mplt yet and acts as if it is always given.
// However, -mplt has no effect with the N64 ABI.
if (ABIName != "64" && !Args.hasArg(options::OPT_mno_abicalls))
CmdArgs.push_back("-call_nonpic");
if (getToolChain().getTriple().isLittleEndian())
CmdArgs.push_back("-EL");
else
CmdArgs.push_back("-EB");
if (Arg *A = Args.getLastArg(options::OPT_mnan_EQ)) {
if (StringRef(A->getValue()) == "2008")
CmdArgs.push_back(Args.MakeArgString("-mnan=2008"));
}
// Add the last -mfp32/-mfpxx/-mfp64 or -mfpxx if it is enabled by default.
if (Arg *A = Args.getLastArg(options::OPT_mfp32, options::OPT_mfpxx,
options::OPT_mfp64)) {
A->claim();
A->render(Args, CmdArgs);
} else if (mips::shouldUseFPXX(
Args, getToolChain().getTriple(), CPUName, ABIName,
mips::getMipsFloatABI(getToolChain().getDriver(), Args,
getToolChain().getTriple())))
CmdArgs.push_back("-mfpxx");
// Pass on -mmips16 or -mno-mips16. However, the assembler equivalent of
// -mno-mips16 is actually -no-mips16.
if (Arg *A =
Args.getLastArg(options::OPT_mips16, options::OPT_mno_mips16)) {
if (A->getOption().matches(options::OPT_mips16)) {
A->claim();
A->render(Args, CmdArgs);
} else {
A->claim();
CmdArgs.push_back("-no-mips16");
}
}
Args.AddLastArg(CmdArgs, options::OPT_mmicromips,
options::OPT_mno_micromips);
Args.AddLastArg(CmdArgs, options::OPT_mdsp, options::OPT_mno_dsp);
Args.AddLastArg(CmdArgs, options::OPT_mdspr2, options::OPT_mno_dspr2);
if (Arg *A = Args.getLastArg(options::OPT_mmsa, options::OPT_mno_msa)) {
// Do not use AddLastArg because not all versions of MIPS assembler
// support -mmsa / -mno-msa options.
if (A->getOption().matches(options::OPT_mmsa))
CmdArgs.push_back(Args.MakeArgString("-mmsa"));
}
Args.AddLastArg(CmdArgs, options::OPT_mhard_float,
options::OPT_msoft_float);
Args.AddLastArg(CmdArgs, options::OPT_mdouble_float,
options::OPT_msingle_float);
Args.AddLastArg(CmdArgs, options::OPT_modd_spreg,
options::OPT_mno_odd_spreg);
AddAssemblerKPIC(getToolChain(), Args, CmdArgs);
break;
}
case llvm::Triple::systemz: {
// Always pass an -march option, since our default of z10 is later
// than the GNU assembler's default.
std::string CPUName = systemz::getSystemZTargetCPU(Args);
CmdArgs.push_back(Args.MakeArgString("-march=" + CPUName));
break;
}
case llvm::Triple::ve:
DefaultAssembler = "nas";
}
for (const Arg *A : Args.filtered(options::OPT_ffile_prefix_map_EQ,
options::OPT_fdebug_prefix_map_EQ)) {
StringRef Map = A->getValue();
if (!Map.contains('='))
D.Diag(diag::err_drv_invalid_argument_to_option)
<< Map << A->getOption().getName();
else {
CmdArgs.push_back(Args.MakeArgString("--debug-prefix-map"));
CmdArgs.push_back(Args.MakeArgString(Map));
}
A->claim();
}
Args.AddAllArgs(CmdArgs, options::OPT_I);
Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
CmdArgs.push_back("-o");
CmdArgs.push_back(Output.getFilename());
for (const auto &II : Inputs)
CmdArgs.push_back(II.getFilename());
if (Arg *A = Args.getLastArg(options::OPT_g_Flag, options::OPT_gN_Group,
options::OPT_gdwarf_2, options::OPT_gdwarf_3,
options::OPT_gdwarf_4, options::OPT_gdwarf_5,
options::OPT_gdwarf))
if (!A->getOption().matches(options::OPT_g0)) {
Args.AddLastArg(CmdArgs, options::OPT_g_Flag);
unsigned DwarfVersion = getDwarfVersion(getToolChain(), Args);
CmdArgs.push_back(Args.MakeArgString("-gdwarf-" + Twine(DwarfVersion)));
}
const char *Exec =
Args.MakeArgString(getToolChain().GetProgramPath(DefaultAssembler));
C.addCommand(std::make_unique<Command>(JA, *this,
ResponseFileSupport::AtFileCurCP(),
Exec, CmdArgs, Inputs, Output));
// Handle the debug info splitting at object creation time if we're
// creating an object.
// TODO: Currently only works on linux with newer objcopy.
if (Args.hasArg(options::OPT_gsplit_dwarf) &&
getToolChain().getTriple().isOSLinux())
SplitDebugInfo(getToolChain(), C, *this, JA, Args, Output,
SplitDebugName(JA, Args, Inputs[0], Output));
}
namespace {
// Filter to remove Multilibs that don't exist as a suffix to Path